Abstract
This study was conducted to examine the effect of calcium intake on the rise in serum 25-hydroxyvitamin D [25(OH)D] levels in response to supplemental vitamin D3. Fifty-two healthy older men and women were randomly assigned to take calcium (500 mg twice daily with meals) or placebo tablets for 90 d between October 1 and the end of March. All participants were placed on 800 IU/d (20 μg/d) vitamin D3. Serum 25(OH)D measurements were made at baseline and on d 30, 60, and 90. The mean baseline 25(OH)D values were 19.2 ± 6.4 ng/ml (47.9 ± 15.9 nmol/liter) in the calcium group and 19.6 ± 6.7 ng/ml (49.1 ± 16.7 nmol/liter) in the control group (P = 0.808). The difference in pattern of change in 25(OH)D was not statistically significant (group by time interaction, P = 0.651); the calcium group increased 6.5 ± 5.9 ng/ml (16.2 ± 14.8 nmol/liter; P < 0.001), and the control group increased 6.6 ± 7.0 ng/ml (16.6 ± 17.4 nmol/liter; P < 0.001). The 95% confidence interval for difference in mean increase, calcium vs. control, was −3.8 ± 3.5 ng/ml (−9.6, 8.7) nmol/liter. In older men and women, the level of calcium intake, within the range of 500-1500 mg/d, does not have an important effect on the rise in serum 25(OH)D that occurs in response to 800 IU (20 μg)/d vitamin D3.
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(1997)
Dates
Type | When |
---|---|
Created | 20 years, 6 months ago (Feb. 7, 2005, 8:17 p.m.) |
Deposited | 5 years, 1 month ago (July 16, 2020, 11:28 p.m.) |
Indexed | 1 year ago (July 29, 2024, 10:32 a.m.) |
Issued | 20 years, 6 months ago (Feb. 1, 2005) |
Published | 20 years, 6 months ago (Feb. 1, 2005) |
Published Print | 20 years, 6 months ago (Feb. 1, 2005) |
@article{Goussous_2005, title={Lack of Effect of Calcium Intake on the 25-Hydroxyvitamin D Response to Oral Vitamin D3}, volume={90}, ISSN={1945-7197}, url={http://dx.doi.org/10.1210/jc.2004-1380}, DOI={10.1210/jc.2004-1380}, number={2}, journal={The Journal of Clinical Endocrinology & Metabolism}, publisher={The Endocrine Society}, author={Goussous, Rula and Song, Lingyi and Dallal, Gerard E. and Dawson-Hughes, Bess}, year={2005}, month=feb, pages={707–711} }